len — Easy Playground

Called by len(); returns the number of items in the object

Python Playground

class Playlist:
    def __init__(self, songs):
        self.songs = songs

    def __len__(self):
        return len(self.songs)

p = Playlist(["song1", "song2", "song3"])
print(len(p))

Output

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__len__ called by len(); returns the number of items in the object. Implementing it lets you customize how Python interacts with your objects.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

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__len__ — Easy Playground

Challenge

len — Easy Playground